So I bought a 92 firebird formula and the accessory fuse keeps blowing. as soon as I put a fuse in it blows and sometimes burns an melts the prongs on the fuse. I looked at all the normal stuff, The cig lighter is disconnected, all the wiring in the center console is good. pulled the headliner and looked at the wiring to the dome light. I don't know what else or where to check. Anybody have any ideas? I would like to be able to open the hatch on the car once in a while. thanks

 

I would use a meter to check resistance to ground. If it's shorting out that hard it should be pretty easy to see on a meter and you won't go through a bunch of fuses trying to find it.
You can hook the meter up and start unplugging things on the circuit until the short goes away. If you changed anything recently then I would suspect that first. If it still doesn't go away then I would start looking for possible shorts in the wiring like pinched or bare wires.

 

look for the accessory wire from the ignition switch to be pinched under the steering column support bracket. Happened to me.

 

thanks guys i will check in the am!

 

Aftermarket radio? Check its plug for possible miswiring and whether the breaker still dies when you disconnect the head unit's plug.

 

I pulled the radio the other day and it didnt make a difference. OEM harness is un cut and there. Im gonna look at it more today to figure it out.

 

on my 89 FORMULA I had an issue with the headlights and the wipers once. pull the hush panel under the dr side dash, drop the fuse block and you will see a chunk of harness right next to an "L" bracket that supports the dash. roll the harness over and see if the insulation on the wire was rubbed off.

a friend had the same exact issue on his 86 T/A. a few pieces of electrical tape, some foam to push the harness away and all is good.

 

When you get sick of blowing a bunch of fuses and wasting money, I usually put a light bulb (12vdc) in series with the fuse that keeps blowing. The light bulb will limit the current in the circuit and save the fuse. If you put the bulb in series and it is glowing at full brightness...you still have the short. If you unplug something that is suspect (for example the cigar lighter with a foil gum wrapper jammed inside causing a short ) and the bulb gets very dim or goes out, you have found the problem. You should be able to use a standard test light. I have done this in the past with various electronic projects (120v a.c. stuff mostly) and it works pretty well. Experiment a bit and have fun with the learning.